C# byte[] 怎么追加写入文本

Question

如题，谢谢大家！

Answer 1

            System.IO.FileStream dataWriter = new System.IO.FileStream("c:\\aa.bin", System.IO.FileMode.Append);
            dataWriter.Seek(0, System.IO.SeekOrigin.End);
            dataWriter.Write(new byte[] { 1, 2, 3, 4, 5, 6, 7 }, 0, 7);
            dataWriter.Flush();
            dataWriter.Close();

Answer 2

一个简洁却不高效的方法byte[] bytes = { 1, 2, 3, 4, 5, 6, 7 };
string string_temp = Encoding.ASCII.GetString(bytes);
File.AppendAllText("c:\\aaa.bin", string_temp);

Answer 3

System.IO.FileStream dataWriter = new System.IO.FileStream("c:\\aa.bin", System.IO.FileMode.Append);
dataWriter.Seek(1000, System.IO.SeekOrigin.End);
byte[] readBuffer = new byte[1000];
dataWriter.Read(readBuffer, 0, 1000);
dataWriter.Close();

Answer 4

UP yixia 回复内容  

Answer 5

            byte[] buffer1 = new byte[32];
            byte[] buffer2 = new byte[32];            Array.Resize<byte>(ref buffer1, buffer1.Length + buffer2.Length);
            Array.Copy(buffer2, buffer1, buffer1.Length, buffer2.Length);

Answer 6

我的文件有26个字节，比如我要取最后写入的4个字节dataWriter.Seek(4, System.IO.SeekOrigin.End);
byte[] readBuffer = new byte[4];
dataWriter.Read(readBuffer, 0, 4);
dataWriter.Close();取到的都是零

Answer 7

如果我换成：dataWriter.Seek(22, System.IO.SeekOrigin.Begin); 
byte[] readBuffer = new byte[4]; 
dataWriter.Read(readBuffer, 0, 4); 
dataWriter.Close(); 是可以取到4个字节的，这只一种变通做法，可以先 datawriter.length-4

Answer 8

dataWriter.Seek(4, System.IO.SeekOrigin.End); 
从文件流的末尾整数4位，当然取不到了啊 试试dataWriter.Seek(-4, System.IO.SeekOrigin.End);